Chain Operated Gate Valve Description
Chain operated gate valve is a derivative type of the knife-type gate valve. It uses a sprocket drive mechanism to drive the gate plate to rise and fall. It is designed for high-level operation, medium containing particles and large flow control scenarios. Its core functions include cutting fiber impurities, fast opening and closing, and adapting to complex installation environments.
Structural composition
The chain gate valve consists of the following core components:
Valve body and gate plate:
Valve body: cast iron, cast steel or stainless steel, the channel is a full-diameter design, and the inner wall sealing surface is precisely machined to match the gate plate;
Gate plate: knife-shaped structure (thickness is only 6-12mm), with sharp edges that can cut fibers or solid particles, and the material can be hardened steel, 316L stainless steel or ceramic coating.
Sprocket drive mechanism:
Sprocket and chain: High-strength alloy steel sprocket meshing precision roller chain, transmission efficiency ≥95%, chain length can be customized (up to 20 meters) to adapt to high-level pipelines;
Drive device: Standard manual sprocket (upgradeable to electric/pneumatic), torque output range 10-500N·m.
Seal and valve stem system:
Seal structure: Bidirectional metal hard seal (leakage rate ≤0.1% DN) or PTFE soft seal (zero leakage), scraper device to prevent impurities from entering the sealing chamber;
Valve stem: Stainless steel material, hard chrome plated surface, packing seal uses graphite winding or V-shaped PTFE ring.
Chain Operated Gate Valve specification
|
item |
value |
|
Structure |
Gate |
|
Application |
General |
|
Place of Origin |
China |
|
Power |
Hydraulic |
|
Customized support |
OEM, ODM |
|
Warranty |
3 years |
|
Model Number |
DN50-DN2000 |
|
Temperature of Media |
High Temperature, Low Temperature, Medium Temperature |
|
Media |
Water |
|
Product name |
Sprocket Drive Knife Gate Valve |
|
Working pressure |
0.6MPa/1.0MPa/1.6MPa/2.5MPa/150Lb |
|
Working Temperature |
-38~+650Celsius degree |
|
Connection |
Flange Connection |
|
Main material |
C.I,WCB,ZG1Cr18Ni9Ti,ZG1Cr18Ni12Mo2Ti,CF8,CF8M,CF3,CF3M,2Cr25Ni20 |
|
Color |
Customized Color |
|
Sealing form |
Soft sea/Stainless Steel Hard seal |
Chain Operated Gate Valve
The core difference from other gate valves
| Comparison Items | Chain gate valve | Ordinary rising stem gate valve | Soft Sealing Knife Gate Valve |
|---|---|---|---|
| Transmission structure | Sprocket + chain remote transmission (supports vertical/inclined installation) | Handwheel directly connected to valve stem (operating space required) | Direct drive by handwheel or electric actuator |
| Sealing form | Optional hard seal (metal/ceramic) or soft seal (PTFE/NBR) | Mainly hard seal (leakage rate ≥ 0.1% DN) | Mainly soft seal (zero leakage but poor temperature resistance) |
| Media adaptability | Tolerant to complex media containing solid particles (≤30% concentration) and fibers | For clean liquids/gases only | Suitable for slurry but easily worn by hard particles |
| Operating torque | Chain drive amplifies torque, DN300 valve manual operating torque ≤ 200N·m | DN300 valve requires ≥500N·m operating torque | Similar to ordinary gate valve |
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